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3 years ago

Need some help still with these 3 questions

Mathematics

1 answer:

disa [49]3 years ago

7 0

Answer:

first : x²-10x=39

{-3;13}

second : multiply both sides by 1\4

last is : {-1;5}

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Solve for x.

kirill115 [55]

How to get answer:

$Expand -2\left(x+13\right)+9x:\quad 7x-26\\Expand -2\left(x+13\right):\quad -2x-26\\\\=-2x-26+9x\\Simplify -2x-26+9x:\quad 7x-26\\7x-26=4\\\mathrm{Add\:}26\mathrm{\:to\:both\:sides}\\7x-26+26=4+26\\\mathrm{Simplify}\\7x=30\\\\\mathrm{Divide\:both\:sides\:by\:}7\\\frac{7x}{7}=\frac{30}{7}\\Simplify\\x=\frac{30}{7}$

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3 years ago

Read 2 more answers

I need help I don’t know how to do this

IgorLugansk [536]

Answer:

PL and LM

Step-by-step explanation:

The definition of perpendicular is two lines that create a 90 degree angle. There are a lot of those in a rectangular prism. One of them is PL and LM, because they intersect to create a right angle.

7 0

2 years ago

Which set of points includes all of the solutions for y = negative three halves times x plus two? line going through 0 comma 2 a

worty [1.4K]

Answer:

$(x,-\frac{3}{2} x+2)$

Step-by-step explanation:

For $y= \frac{-3}{2} x+2$ the set of points that include all solutions are $(x,y)$ such that $y= \frac{-3}{2} x+2$ ; then we have $(x,y)=(x,\frac{-3}{2} x+2)$ .

What is important to stress here is that $(x,-\frac{3}{2} x+2)$ represents all of the solutions, while other points that we are given represent one solution (for example, point (2,-1) is just one solution)

5 0

3 years ago

Which scenario cannot be modeled by a right triangle?

kipiarov [429]

Answer:

Step-by-step explanation:

3 0

4 years ago

Can y’all help me please !

Leviafan [203]

no because she turned it only 90 degrees not 180.

180 would be a mirror reflection

6 0

3 years ago